四氢呋喃聚合中活性中心向醋酸酐链转移的研究  

A Study of Chain Transfer to Acetic Anhydride in the Polymerization of Tetrahydrofuran

作　　者：栗方星[1] 李春刚[1] 刘利平 

机构地区：[1]南开大学化学系,天津300071

出　　处：《化学工业与工程》1993年第4期15-21,共7页Chemical Industry and Engineering

摘　　要：本文介绍在有醋酸酐存在时采用乙酰基四氟硼酸盐CH_3COBF_4为催化剂进行四氢呋喃(THF)聚合反应;讨论了THF聚合及链转移的反应机理,发现醋酸酐对聚合速度有明显的影响。计算出0℃,6℃和15℃时的表观聚合反应速度常数K_p 分别为3.59,5.11和11.53×10^(-3)/mol·s;表观链转移速度常数K_(tr)分别为2.03,3.95和8.23×10^(-3)/mol·s;表观聚合反应活化能E_p 和链转移反应活化能E_(tr)分别为51.2和61.3 kJ/mol。In this paper,the polymerization of tetrahydrofuran with (CH_3COBF_4as catalyst in the presence of acetic anhydride and the kinetic machanismof polymerization and chian transfer were discussed in detail.It has beenfound that acetic anhydride has a great influence on the polymerizationrate constants The apparent rate constants of polymerization are 3.59,5.11 and 11.53×10^(-3)L/mol·s;the apparent rate constants of chain tran-sfer are 2.03,3.59 and 8.23×10^(-3)L/mol·s respectively

关 键 词：聚四氢呋喃 醋酸酐 催化剂 

分 类 号：O626.11[理学—有机化学]